This series of double roll crusher mainly composed by roller,the roller bearing support,pressed and adjusting device,driving device etc. The discharging-size regulation: between two roller equipped with cuneate or gasket adjusting device, top of the wedge device capped with adjustment bolts, when the adjustment bolts pull upward wedge which will bear against the fixed wheel to make it deviate from the movable roller wheel, then the gap between wheels become large, discharging size become bigger, otherwise the opposite. gasket device is through the quantity or thickness to adjust the materials size, when adding gaskets the gap between wheels become large , when reducing gaskets the gap between wheels become small .so the discharging size becomes sma